Loom



Patented Jan. 21, 1936 PATENT OFFICE LOOM Jonas Northrop, Hopedale, Mass, assignor to Draper Corporation, Hopedale, Mass, a corporation of Maine Application September 29, 1934, Serial No. 746,213

7 Claims.

The present invention pertains to the filling replenishing mechanism of automatic looms, and has more particular reference to the revoking devices thereof for revoking a call for replenishment when the shuttle is improperly boxed.

In the conventional automatic loom the filling replenishing mechanism is positioned for transfer while the lay is well back and the replenishing operation occurs at a later time, usually when the lay is at front center. Such looms are customarily provided with a shuttle feeler and connections therefrom for revoking or preventing the transferring operation if, on the replenishing beat of the lay, the shuttle fails to enter the shuttle box 15 to its full depth.

While the conventional shuttle feeler adequately guards against damage occasioned by the failure of the shuttle to fully enter the box, it is inoperative to prevent such damage when the 20 shuttle boxes too far. It has been proposed to so construct the shuttle feeler mechanism as to guard against damage from both of the aforesaid causes, but such prior constructions have not been satisfactory and, so far as I am aware, have -5 never been used commercially. I find it impracticable to provide a single shuttle feeler mechanism having what, in reality, amounts to two separate functions, and accordingly propose to provide a separate shuttle feeler mechanism for revoking 31 a call for replenishment when the shuttle boxes to more than its normal depth.

The shuttle cannot box too far for proper replenishment unless there exists in the loom some fixed defect such as a badly worn picker, in which 35 event the loom should not be continued in operation but should be promptly stopped and repaired. It is accordingly an object of the present invention to provide a revoking mechanism which is normally in inoperative condition but which is rendered operative whenever the shuttle boxes too far, to thereafter prevent any replenishing operation taking place until the device is manually reset.

A further object of the present invention is to 45 provide, in a filling replenishing loom, a shuttle feeler and revoking mechanism controlled thereby which are normally stationary but which are movable to revoking position only when the shuttle enters the shuttle box too far to permit proper v replenishment to take place.

Further objects of the invention will become apparent as the description proceeds.

The specific embodiment of the invention herein disclosed is applied to a bobbin changing loom 55 wherein a transfer hammer has pivoted thereto a dog which is movable to and from position where it is engageable by a lay bunter. A second dog is connected so that, when actuated, it positively removes the first dog from operative position. The second dog is operable by a bunter which is mounted on and slidable longitudinally of the lay but which is normally held in inoperative position by a latch member. A normally stationary shuttle feeler in the shuttle box is connected to release the latch when the shuttle enters the box to more than its normal depth.

A spring is connected to move the revoking bunter to revoking position upon release of the latch, the spring thereafter holding the bunter in revoking position until the loom is stopped and the latch manually reset.

For more detailed disclosure of the said embodiment, reference may be had to the accompanying drawings, of which:

Fig. 1 is a perspective view of the right hand shuttle box and contiguous parts;

Fig. 2 is a plan view of the right hand end of the y;

Fig. 3 is a view similar to Fig. 2 but showing the parts in normal or running position; and 26 Fig. 4 is a front elevation of the same.

The 100111 to which the invention has been applied is but fragmentarily illustrated on the drawings, the illustrated parts including a loom side I,

a breast beam 2, a lay 3, lay sword 4, and certain parts of the filling replenishing mechanism to be more fully described Other parts of the loom are old and well known in the art and form no part of the present invention, and accordingly are not shown or described.

The shuttle 5 is adapted to be picked along the lay as by picker stick 6 and is received at each ,end of its flight in a shuttle box. Only the right hand shuttle box is shown, the same being comprised of a back box plate 7 and front box plate 8 secured to the lay, and a binder 9. The shuttle carries a renewable filling supply, as by means of the automatically ejectable bobbin Ill;

The loom is shown as being of the bobbin changing variety wherein a rotary magazine H is positioned directly over the shuttle box and the bobbins contained in the magazine are adapted to be transferred, successively, to the shuttle by a transfer hammer l2. A dog I3 is pivoted to the transfer hammer for movement to and from position where it can be engaged by a lay bunter M to effect the actual transfer.

The dog I3 is controlled by an arm [5 through the medium of a pin I6 projecting from the side of the dog. The arm l5 moves upwardly W and rearwardly to raise the dog to transferring position, and is so moved by or through the usual shuttle feeler mechanism, not shown.

As is above noted, certain defects in the loom will result in the shuttle entering the shuttle box to such an abnormal extent that the filling replenishing mechanism cannot efiect the replenishment and will consequently damage the loom if replenishment is attempted. The defects which permit the shuttle to thus box abnormally are usually such as to result in repeated or recurrent abnormal boxing of the shuttle, as distinguished from the transitory defects which cause the shuttle to fail to fully enter the box. The present invention accordingly provides revoking means which is normally stationary and inoperative but which is released by the shuttle whenever, on any pick, the shuttle boxes too far. Once the revoking means is so released no replenishment can take place on the same or any subsequentpick. The loomwill thereupon stop from the filling fork (not shown), thus directing attention to the defective condition of the loom.

The specific revoking means shown includes a bunter I! on plate l8 which is mounted on and movable along the lay as by sliding on bolt l9 and pin 26. The bunter is normally inwardly (i. e. tothe left) from a dog 2i which is mounted on a pin 22 projecting from the arm [5. The bunter is held in this inoperative position by a latch 23 which is pivoted as at 24 to the lay. A tension spring 25 has one end connected to an arm on the latch and its other end connected to a pin on the plate IS. The spring thus serves the dual purpose of biasing the bunter ll toward operative position and holding the latch in engagement with the plate. The parts are normally stationary in the position shown by Figs. 3 and l. While in such position, the bunter passes idly beside the dog and does not interfere with the replenishing operation.

7 A shuttle feeler 26 (which may be integral with the latch 23) projects into the shuttle box in such position that it will normally (Fig. 3) not be engaged by the fully boxed shuttle. However, should the shuttle box to a greater depth than usual it'will engage the shuttle feeler and move the latter in such direction as to release the latch. This may occur on any pick, during or prior to a call for replenishment. Promptly upon release of the latch the spring 25 pulls the bunter to the right, to the position shown by Figs. 1 and 2. It will be apparent that the hunter will stay in such position until it is manually reset.

Once the bunter has moved as just described filling replenishment cannot take place, for if the dog I3 is moved upwardly it will be again forced downwardly before replenishment, through engagement of the dog 2! by bunter I I. Then, as soon as the filling supply is entirely exhausted the loom will stop, whereupon the defective operating condition may be repaired and the revoking device manually reset.

Having fully disclosed the preferred embodiment of my invention, I claim:

1. In a filling replenishing loom, the combination of the lay, a shuttle, a shuttle box, filling replenishing means, a normally stationary shuttle feeler capable of being moved by said shuttle when the latter enters said shuttle box to a more than normal depth, and means controlled by said shuttle feeler for rendering said filling replenishing mechanism inoperative.

2. In'a filling replenishing loom, the combination of the lay, a shuttle, a shuttle box, filling replenishing means, a shuttle feeler carried by the lay and normally stationary thereon, said shuttle feeler being engageable and movable by said shuttle when the latter enters said shuttle box to a more than normal depth, and means controlled by said movement of the shuttle feeler to render said filling replenishing means inoperative.

3. In a filling replenishing loom, the combination of the lay, a shuttle, a shuttle box, filling replenishing means, means for rendering said replenishing means inoperative, a latch normally holding said preventing means out of operation, and a shuttle feeler for releasing said latch when said shuttle enters said shuttle box to a more than normal depth.

4. In .a filling replenishing loom, the combination of the lay, a shuttle, a shuttle box, filling replenishing means including a dog which is movable to and from operative position, means for removing said dog from said position prior tola replenishing operation when saidshuttle enters said shuttle box to a more than-normal depth, said last mentioned means including abunter movable on the lay to and from operative'position, and means for holding said bunter in 'opera- 30 tive position until it is manually removed'therefrom.

5. In a filling replenishing loom, the combination of the lay, a shuttle, a shuttlebox' filling replenishing means, means including a bunter 5 movable to and from position whereitrenders said filling replenishing means inoperative, a latch for holding said bunter out of said" position, means for releasing said latch when: said shuttle enters said shuttle box to a -moreth'an normal depth, and means operativeupon release of said latch to move said bunter to said position and hold it in such position until manually released therefrom.

6. In a filling replenishing loom, the combination of the lay, a shuttle, a shuttle box,fill'ing replenishing means including a dog which is movable to and from operative position, a lay bunter engaging said dog to eii -ect filling replenishment, a second bunter slidablealong the lay to and from position where it removes said dog from said position prior to a replenishing operation, and means operative to move said second bunter to its said position when the shuttle enters saidshuttle box-to a-more than-normal depth.

'7. In a filling replenishing loom, the combination of the lay, a shuttle, a shuttle box; filling replenishing means including a transferrer-and a dog pivoted thereto, means for moving said dog to transferringposition and means-for removing said dog from said position when the shuttle enters said shuttle box to a more than normal depth, said last mentioned means including a bunter movable along the-lay, a latch for holding said bunter out of operation, a shuttlefeelerior releasing said latch, and means operable-upon release of said latch for moving 'saidbunter'to operative position.

.JONAS NORTHROP. 

